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Yes, both tea (black tea at least, English speakers usually mean black tea when they say tea anyway) and coffee have caffeine which is addictive. Apparently, being able to correctly reply to this question involves defining the word "addiction". My guess is that the negative connotation of the word "addiction" will cause some pressure to not use it. Here's ...


The mechanism of action of cocaine is dependent on pre-existing dopamine production and secretion. Normally, secreted dopamine is cleared from the synapse via the dopamine transporter (DAT) located on presynaptic dopaminergic terminals. Cocaine inhibits this reuptake of dopamine, increasing it's duration of action on post-synaptic dopamine receptors. Thus, ...

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